US7763574B2ExpiredUtilityPatentIndex 61
Lubricating compositions containing synthetic ester base oil, molybdenum compounds and thiadiazole-based compounds
Est. expiryOct 10, 2023(expired)· nominal 20-yr term from priority
C10M 2219/066C10M 2209/105C10N 2010/12C10M 2219/068C10M 2209/104C10N 2010/04C10N 2030/06C10M 2219/106C10M 141/10C10N 2050/10C10M 2223/045C10M 2225/00C10M 163/00C10M 2207/046C10M 141/08C10M 2207/2805C10M 2223/04
61
PatentIndex Score
6
Cited by
14
References
23
Claims
Abstract
A lubrication composition providing excellent anti-wear protection for corrosion-resistant materials which comprises a major amount of a synthetic ester base oil, and a minor amount of a molybdenum compound and an anti-wear additive selected from the group consisting of 1,3,4-thiadiazole derivative as an anti-wear additive, the reaction products of 2,5-dimercapto-1,3,4-thiadiazole dimers and poly(ether)glycols, and 2,5-dimercapto-1,3,4-thiadiazole monomer and mixtures thereof. Also described is a method for imparting anti-wear properties to a corrosion resistant material, comprising using the lubricating composition of the invention.
Claims
exact text as granted — not AI-modified1. A method for imparting anti-wear properties to a high chrome alloy steel, comprising using an effective amount of a lubricating composition on a high chrome alloy steel surface, the lubricating composition comprising a major amount of a grease or synthetic ester base oil and a minor amount of:
(a) a molybdenum compound selected from the group consisting of molybdenum dithiocarbamate, molybdenum dithiophosphate and a mixture thereof; and
(b) one or more anti-wear compound(s) selected from the group consisting of:
(i) a reaction product of:
(A) a thiadiazole dimer having formula (I):
where Z is hydrogen, or an alkyloxy linkage having formula (II):
or combinations thereof, with R 1 being hydrogen, a branched or straight chain C 1 to C 7 alkyl radical, or combinations thereof and R 2 being hydrogen, a branched or straight chain C 1 to C 7 alkyl radical, or combinations thereof, with n being 1 to 2 and t being 0 or 1; and
(B) a poly(ether)glycol having formula (III):
where F is a hydroxyl radical, a branched or straight chain C 1 to C 20 alkoxyl radical, a branched or straight chain C 1 to C 20 alkylcarboxyl radical, a mono-substituted, disubstituted, or tri-substituted glycerol residue, hydrogen, or combinations thereof; where R 3 is hydrogen, a methyl radical, or combinations thereof; where R 4 is hydrogen, a branched or straight chain C 1 to C 20 alkyl radical, a phenyl radical, a C 1 to C 8 branched or straight chain alkyl-substituted-phenyl radical, a C 1 to C 20 branched or straight chain acyl radical, or combinations thereof; and with q being 1 to 300;
(ii) a reaction product of:
(A) a thiadiazole dimer having formula (VI):
where d is 1 to 5 and Z is hydrogen, an alkyloxy linkage having formula (II):
or combinations thereof, with R 1 being hydrogen, a branched or straight chain C 1 to C 7 alkyl radical, or combinations thereof and R 2 being hydrogen, a branched or straight chain C 1 to C 7 alkyl radical, or combinations thereof, wherein t is 0 or 1; and
(B) a poly(ether)glycol having formula (III):
where F is a hydroxyl radical, a branched or straight chain C 1 to C 20 alkoxyl radical, a branched or straight chain C 1 to C 20 alkylcarboxyl radical, a mono-substituted, disubstituted, or tri-substituted glycerol residue, hydrogen, or combinations thereof; where R 3 is hydrogen, a methyl radical, or combinations thereof; where R 4 is hydrogen, a branched or straight chain C 1 to C 20 alkyl radical, a phenyl radical, a C 1 to C 8 branched or straight chain alkyl-substituted-phenyl radical, a C 1 to C 20 branched or straight chain acyl radical, or combinations thereof; and with q being 1 to 300; and
(iii) a mono or dimercapto-1,3,4-thiadiazole monomer which has the structure of formula (VII):
Where R5 is mercaptan, —SH or hydrogen, —H, wherein the weight ratio of the molybdenum compound (a) to the anti-wear compound/compounds (b) is about 1:10 to about 10:1.
2. The method of claim 1 , wherein the weight ratio of the molybdenum compound to the anti-wear compound is about 1:4 to about 4:1.
3. The method of claim 2 , wherein the weight ratio of the molybdenum compound to the anti-wear compound is about 1:2 to about 1:1.
4. The method of claim 1 , wherein the anti-wear compound is (i).
5. The method of claim 4 , wherein the reaction product comprises of one or both of a compound of formula (IV):
or a compound of formula (V)
wherein in is 1 to 50.
6. The method of claim 1 , wherein the anti-wear compound is (ii).
7. The method of claim 1 , wherein the anti-wear compound is (iii).
8. The method of claim 1 , wherein the molybdenum compound is molybdenum dithiocarbamate.
9. The method of claim 8 , wherein the molybdenum dithiocarbamate is molybdenum dialkylthiocarbamate.
10. The method of claim 1 , wherein the molybdenum compound is molybdenum dithiophosphate.
11. The method of claim 2 , wherein the molybdenum dithiophosphate is molybdenum di(2ethylhexyl)phosphorodithioate.
12. The method according to claim 1 , wherein the steel is 440C stainless steel.
13. In combination, a high chrome alloy and a lubricating composition comprised of a major amount of a grease or synthetic ester base oil and a minor amount of:
(a) a molybdenum compound selected from the group consisting of molybdenum dithiocarbamate, molybdenum dithiophosphate and a mixture thereof; and
(b) one or more anti-wear compound(s) selected from the group consisting of:
(i) a reaction product of:
(A) a thiadiazole dimer having formula (I):
where Z is hydrogen, or an alkyloxy linkage having formula (II):
or combinations thereof, with R 1 being hydrogen, a branched or straight chain C 1 to C 7 alkyl radical, or combinations thereof and R 2 being hydrogen, a branched or straight chain C 1 to C 7 alkyl radical, or combinations thereof, with it being 1 to 2 and being 0 or 1; and
(B) a poly(ether)glycol having formula (III):
where F is a hydroxyl radical, a branched or straight chain C 1 to C 20 alkoxyl radical, a branched or straight chain C 1 to C 20 alkylcarboxyl radical, a mono-substituted, disubstituted, or tri-substituted glycerol residue, hydrogen, or combinations thereof; where R 3 is hydrogen, a methyl radical, or combinations thereof; where R 4 is hydrogen, a branched or straight chain C 1 to C 20 alkyl radical, a phenyl radical, a C 1 to C 8 branched or straight chain alkyl-substituted-phenyl radical, a C 1 to C 20 branched or straight chain acyl radical, or combinations thereof; and with q being 1 to 300;
(ii) a reaction product of:
(A) a thiadiazole dimer having formula (VI):
where d is 1 to 5 and Z is hydrogen, an alkyloxy linkage having formula (II):
or combinations thereof, with R 1 being hydrogen, a branched or straight chain C 1 to C 7 alkyl radical, or combinations thereof and R 2 being hydrogen, a branched or straight chain C 1 to C 7 alkyl radical, or combinations thereof, wherein t is 0 or 1; and
(B) a poly(ether)glycol having formula (III):
where F is a hydroxyl radical, a branched or straight chain C 1 to C 20 alkoxyl radical, a branched or straight chain C 1 to C 20 alkylcarboxyl radical, a mono-substituted, disubstituted, or tri-substituted glycerol residue, hydrogen, or combinations thereof; where R 3 is hydrogen, a methyl radical, or combinations thereof; where R 4 is hydrogen, a branched or straight chain C 1 to C 20 alkyl radical, a phenyl radical, a C 1 to C 8 branched or straight chain alkyl-substituted-phenyl radical, a C 1 to C 20 branched or straight chain acyl radical, or combinations thereof; and with q being 1 to 300; and
(iii) a mono or dimercapto-1,3,4-thiadiazole monomer which has the structure of formula (VII):
Where R5 is mercaptan —SH or hydrogen, —H, wherein the weight ratio of the molybdenum compound (a) to the anti-wear compound/compounds (b) is about 1:10 to about 10:1.
14. The combination of claim 13 , wherein the weight ratio of the molybdenum compound to the anti-wear compound is about 1:4 to about 4:1.
15. The combination of claim 14 , wherein the weight ratio of the molybdenum compound to the anti-wear compound is about 1:2 to about 1:1.
16. The combination of claim 13 , wherein the anti-wear compound is (i).
17. The combination of claim 16 , wherein the reaction product comprises of one or both of a compound of formula (IV):
or a compound of formula (V)
wherein m is 1 to 50.
18. The combination of claim 13 , wherein the anti-wear compound is (ii).
19. The combination of claim 13 , wherein the anti-wear compound is (iii).
20. The combination of claim 13 , wherein the molybdenum compound is molybdenum dithiocarbamate.
21. The combination of claim 20 , wherein the molybdenum dithiocarbamate is molybdenum dialkylthiocarbamate.
22. The combination of claim 13 , wherein the molybdenum compound is molybdenum dithiophosphate.
23. The combination of claim 14 , wherein the molybdenum dithiophosphate is molybdenum di(2-ethylhexyl)phosphorodithioate.Cited by (0)
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